<template>
  <div class="upload-container">
    <el-button
      icon="el-icon-upload"
      size="mini"
      :style="{background:color,borderColor:color}"
      type="primary"
      @click=" dialogVisible=true"
    >上传图片
    </el-button>
    <el-dialog append-to-body :visible.sync="dialogVisible">
      <el-upload
        class="editor-slide-upload"
        action="http://macro-oss.oss-cn-shenzhen.aliyuncs.com"
        :data="dataObj"
        :multiple="true"
        :file-list="fileList"
        :show-file-list="true"
        list-type="picture-card"
        :on-remove="handleRemove"
        :on-success="handleSuccess"
        :before-upload="beforeUpload"
      >
        <el-button size="small" type="primary">点击上传</el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">取 消</el-button>
      <el-button type="primary" @click="handleSubmit">确 定</el-button>
    </el-dialog>
  </div>
</template>

<script>
import { policy } from '@/api/upload/oss'

export default {
  name: 'EditorSlideUpload',
  props: {
    color: {
      type: String,
      default: '#1890ff'
    }
  },
  data () {
    return {
      dialogVisible: false,
      listObj: {},
      fileList: [],
      dataObj: {
        policy: '',
        signature: '',
        key: '',
        ossaccessKeyId: '',
        dir: '',
        host: ''
      }
    }
  },
  methods: {
    checkAllSuccess () {
      return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
    },
    handleSubmit () {
      const arr = Object.keys(this.listObj).map(v => this.listObj[v])
      if (!this.checkAllSuccess()) {
        this.$message('请等待所有图片上传成功 或 出现了网络问题，请刷新页面重新上传！')
        return
      }
      console.log(arr)
      this.$emit('successCBK', arr)
      this.listObj = {}
      this.fileList = []
      this.dialogVisible = false
    },
    handleSuccess (response, file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          this.listObj[objKeyArr[i]].url = this.dataObj.host + '/' + this.dataObj.dir + '/' + file.name
          this.listObj[objKeyArr[i]].hasSuccess = true
          return
        }
      }
    },
    handleRemove (file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          delete this.listObj[objKeyArr[i]]
          return
        }
      }
    },
    beforeUpload (file) {
      const _self = this
      const fileName = file.uid
      this.listObj[fileName] = {}
      return new Promise((resolve, reject) => {
        policy().then(response => {
          _self.dataObj.policy = response.data.policy
          _self.dataObj.signature = response.data.signature
          _self.dataObj.ossaccessKeyId = response.data.accessKeyId
          _self.dataObj.key = response.data.dir + '/${filename}'
          _self.dataObj.dir = response.data.dir
          _self.dataObj.host = response.data.host
          _self.listObj[fileName] = { hasSuccess: false, uid: file.uid, width: this.width, height: this.height }
          resolve(true)
        }).catch(err => {
          console.log(err)
          reject(false)
        })
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.upload-container{
  .editor-slide-upload{
    margin-bottom:20px;
  }
}
</style>
